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Expired European patentEurope

Diphenylazomethines carrying an esterified chain, their preparation and their therapeutical use

EP 0125975 B1 · Applicant: SYNTHELABO

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed May 2, 1984 and granted March 26, 1986. A European patent lasts at most 20 years from filing, so its term ended May 2, 2004.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by November 2, 2009.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledMay 2, 1984
PublishedNovember 21, 1984
GrantedMarch 26, 1986
Term endedMay 2, 2004
Application numberEP 84400889
Classification (CPC)C07D307/12

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedMay 2, 1984PublishedNov 21, 1984Patent grantedMarch 26, 1986Term endedMay 2, 2004

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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